Odd lot orders??

If I am trying to get into lets say 156 shares (I know this is not considered an odd lot)...what is the best/cheapest way to go about getting the shares?

If I market to NYSE it's the easiest way to get filled, but with the hybrid, I am paying higher than inside ECN's a lot of times and getting screwed on the market order.

If I go to an ECN...sometimes they will split the order, so I will get 100 shares and then 56 (which IS an odd lot)...and I have heard that ARCA charges a lot more for odd lot orders. Is that true? Is ISLD the same way?

Basically trying to see if I can avoid market orders to NYSE (obviously I can limit, but prefer immediate fills), and potentially get inside ECN price...and want to see if anyone knows about the commission fees for odd lots to ecn's.